期刊
MYCORRHIZA
卷 27, 期 5, 页码 487-497出版社
SPRINGER
DOI: 10.1007/s00572-017-0766-z
关键词
Ectomycorrhizal fungi; Diversity; Larix chinensis; Alpine treeline ecotone; Taibai Mountain
资金
- Fund for National Science-Technology Support Project in China [2015BAD07B02]
- National Natural Science Foundation of China [31300525]
- Doctoral Scientific Research Foundation from Northwest AF University [Z111021309]
Alpine treeline ecotones represent ecosystems that are vulnerable to climate change. We investigated the ectomycorrhizal (ECM) community, which has potential to stabilize alpine ecosystems. ECM communities associated with Larix chinensis were studied in four zones along a natural ecotone from a mixed forest stand over pure forest stands, the timberline, and eventually, the treeline (3050-3450 m) in Tabai Mountain, China. Sixty operational taxonomic units (OTUs) of ECM fungi were identified by sequencing the rDNA internal transcribed spacer of ECM tips. The richness of ECM species increased with elevation. The soil C/N ratio was the most important factor explaining ECM species richness. The treeline zone harbored some unique ECM fungi whereas no unique genera were observed in the timberline and pure forest zone. Elevation and topography were equally important factors influencing ECM communities in the alpine region. We suggest that a higher diversity of the ECM fungal community associated with L. chinensis in the treeline zone could result from niche differentiation.
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